I enjoyed reviewing your images taken with the Jupiter-3. I am thinking of purchasing one of these and wondered if you noticed the focus shift that occurs when you change aperture. From reading reviews on a number of rangefinder forums, I see that users lean into the shot when they stop down, as the focal plane can shift 1-2 inches, from the wide open focusing.

Thanks for showing this, Ned. I've not seen one of these Eumig projectors for many years. My late father was a cine enthusiast when I was a youngster and I can remember going with him on a round trip of around 300+ miles to buy one of these (may have been an earlier version), long before the internet and mail-order buying in the UK! Brought back a lot of happy memories.:smile::smile::smile:

Thanks for showing this, Ned. I've not seen one of these Eumig projectors for many years. My late father was a cine enthusiast when I was a youngster and I can remember going with him on a round trip of around 300+ miles to buy one of these (may have been an earlier version), long before the internet and mail-order buying in the UK! Brought back a lot of happy memories.:smile::smile::smile:

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Yes, they are pretty neat things! This particular one is my own, and I still haven't figured out what to do with it yet...

Here are some more photos from the Jupiter-3...

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I will probably end up with more J-3 images soon, as I have gotten a second E-PM1 and have decided to pair it up in a really small compact bag with the J-3 for a super lightweight kit. I imagine I'll be carrying this one around with me more often now.

Some nice images, Ned, but nothing that tests the lens at or near its widest aperture.

The results at f/1.5 or f/2 are what most people buy these lenses for. As they are made in the former Soviet Union, sample variation is to be expected, but a good example will provide a delightful rendering when used wide open, or stopped down just a little.

1951 Jupiter-3 with a rear module from a 1957 J-3. the original rear module had etched glass. "left over parts" from a Carl Zeiss Jena Sonnar conversion, this J-3 was originally FED/Zorki mount, and is now Contax mount. I will be using it on a Contax II.

Wide-Open at f1.5, on the Olympus EP2.

Low-Angle, flipped the Finder up for this one.

Flare-test, sunlight illuminating the front element.

the original real triplet was not coated, the new one is. Finding a good match required going through a few lenses. I have ~10 J-3 parts lenses.

This J-3 is sharp, even wide-open. This particular lens now has a German glass for the front section, Russian glass for the rear.

Lens positioned to get the front element out of the sun.

Focus shift on the J-3, and any lens- is not an issue for mirrorless cameras when you focus with the lens stopped-down to the taking aperture. It is an issue on a rangefinder camera, and on SLR's when focus is done wide-open and the lens stops down for taking the picture.

I took a rather aging Jupiter 3 50mm out onto my patio this afternoon. The glass is nice. The fstop is a little wonky. The focus ring works, but i'm sure it needs a bit of repair as only a small portion of the focus ring actually shifts focus.

Perhaps some more interesting subjects will make me like this lens a bit more.

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